Well, in real life it *is* hard to pay attention to more than one or two people at once. A story written in a tight single POV isn't suddenly going to broaden that focus - but you could choreograph it so that what's happening comes to the main character sequentially, I should think.

Hmm. Interesting problem. I wonder if it's that in fic, too, so much writing is done not just from one character's perspective but from deep inside their head as well?